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ZC63A Magnesium vs. SAE-AISI H12 Steel

ZC63A magnesium belongs to the magnesium alloys classification, while SAE-AISI H12 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ZC63A magnesium and the bottom bar is SAE-AISI H12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 48
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 19
75
Tensile Strength: Ultimate (UTS), MPa 220
690 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Melting Completion (Liquidus), °C 550
1480
Melting Onset (Solidus), °C 470
1440
Specific Heat Capacity, J/kg-K 950
470
Thermal Conductivity, W/m-K 120
36
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
9.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.0
Density, g/cm3 2.1
7.9
Embodied Carbon, kg CO2/kg material 22
2.9
Embodied Energy, MJ/kg 150
41
Embodied Water, L/kg 920
76

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 58
24
Strength to Weight: Axial, points 29
24 to 65
Strength to Weight: Bending, points 38
22 to 42
Thermal Diffusivity, mm2/s 58
9.8
Thermal Shock Resistance, points 12
22 to 60

Alloy Composition


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Carbon (C), % 0
0.3 to 0.4
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 2.4 to 3.0
0 to 0.25
Iron (Fe), % 0
87.8 to 91.7
Magnesium (Mg), % 89.2 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
0.2 to 0.5
Molybdenum (Mo), % 0
1.3 to 1.8
Nickel (Ni), % 0 to 0.010
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.2
0.8 to 1.2
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
1.0 to 1.7
Vanadium (V), % 0
0 to 0.5
Zinc (Zn), % 5.5 to 6.5
0
Residuals, % 0 to 0.3
0